Chainsaw Repair

I believer you are correct Kevin.

Title is correct, 394 bb kit, which hyway  makes for the 395 and 394 with a carb conversion kit.

Next this is not a NWP kit, that did seem to run like poop in the video, its the hyway bb kit.  Now I have a BB kit from hyway on my 365, problem is, hyway kept the ports the same size on the 395 bb kit as the 372 bb kit.

Next question, as I don't have a 395 jug, and never ran one, how does the 395 and 394 compare stock to stock?

And NO Hyway does not make a 394 BB kit. They only make a 395 BB kit that can be adapted to a 394 with the addition of a kit so that you can use the 395 intake tract in place of the 394 intake tract.

Well make sure you are comparing apples to apples. I'm sure that you can always return it for a refund.
Advertised HP on the 394 is 7.1hp@8,800, on the 395 it is 7.1 hp@8700

It is a change in the porting design. The 272s used the dual port design same as the 394 but the quad ported 372s were known to make more torque perhaps the same sort of thing is gong on with the 394/395. The only thing the BB kits do is increase the bore, the manufacturers (no matter the manufacturer) never state that they re-ported the jug to take advantage of the increase in bore. It is sort of the American way, 'if 1 is good the 5 is 5 times as good'.